**Core Concept**
Froth in the mouth and nostrils is a key postmortem finding that indicates recent submersion in water, reflecting the presence of surfactant and water in the respiratory tract due to inhalation during drowning.

**Why the Correct Answer is Right**
Froth in the mouth and nostrils results from the mixing of water with pulmonary surfactant and secretions during active inhalation of water. This frothing occurs in the early stages of drowning and is a direct sign of aspiration. It is more specific and reliable than other signs, as it reflects actual water entry into the respiratory system. The froth is often visible immediately after death and is considered a classic indicator of antemortem drowning.

**Why Each Wrong Option is Incorrect**
Option B: Cutis anserina is a pale, gooseflesh-like rash caused by hypoxia, but it is not specific to drowning and may occur in other conditions like cardiac arrest or hypothermia.
Option C: Washerman’s hand refers to a hand with water marks, but it is not a reliable indicator and is often postmortem or misinterpreted.
Option D: Water in the nose is not a reliable sign because it can be present due to surface contact or postmortem changes, not actual inhalation.

**Clinical Pearl / High-Yield Fact**
Froth in the mouth and nostrils is the most specific and commonly accepted sign of antemortem drowning. Always look for this in the context of a history of water exposure and hypoxia.

✓ Correct Answer: A. Froth in mouth and nostrils